The files in lib/ are not what is tested by a module's test suite, and are not what will be installed on your system. The stuff that is tested - and the stuff which will be installed - is in blib/. (Though often the stuff in blib/ is just a verbatim copy - created during the build process - of the stuff in lib/.)

The fact that you have found Mozilla/CA.pm in lib/ but not blib/ suggests something went wrong at build time, before the test suite was run.